Motor-vehicle heater



Nov. 29,1927. 1,650,977

- P. O. BJERKE MOTOR VEHI OLE HEATER Original Filed May 9, 1925 I INVENT'IZL'L 2135? W QII. BY QQk/ze ATTORN S Patented Nov. 29, i927.

with??? a'rziar rrics.

PETER O. BJERQKE, 0F GLIFFSIDE, NEJV JERSEY, ASSIGNOR ONE-HALF T 0 HALTER MITCHELL, O]? LYNBROOK, LUNG- IELSLAHD. NEW YORK.

ll'IOTGR-VEHTCLE HEATER.

Application filed May 9, 1925, Serial No. 29,032. Renewed. October 14, 1927.

desirable temperature will *be maintained and, furthermore, so constructed thatthe heater will retain its heat for a considerable period of time after the source of heat, such as the engine exhaust has been discontinued.

Another object of the invention is to provide a heater that can be economically inanufactured and installed.

Further objects of the invention will appear from the following specification taken in connection with the drawings, which form a part of this application and in which.

Fig. 1 is a top plan view partly in section and partly broken away illustrating a heater constructed in accordance with the invention.

Fig. 2 is a sectional elevation taken sub stantially on line 2-2 of Fig. 1.

Fig. 3 is a transverse sectional elevation showing the heater connected to a tank or container, and

Fig. 4 is an elevational view partly broken away illustrating the device mounted on a motor bus.

The invention briefly described consists of a heater comprising a bypass conduit adaptcd for connection to the exhaust conduit of an internal combustion engine whereby the exhaust gases may be. conducted through the bypass conduit. The bypass conduit is jacketed. and means is provided for circulating' liquid through the jacket: or jackets. In the embodiment of the invention shown, a valve is provided for controlling the pas sage of the exhaust gas through the ill/P2188. Further details of the invention will appear from the following description.

Fig. 1. shows a portion 10 of a conduit leading from the exhaust manifold of an in ternal combustion engine. This conduit is connected at 11 to a pipe 12 having a valve 13 therein disposed between the inlet conduit 10 and an outlet conduit 14:.

The pipe 12 is also connected to elongated pipes 15 and 16 which in turn are connected together at their opposite ends by a pipe 17.

When the valve 13 is closed, the exhaust gas passes from the conduit 107into pipe 152 and through pipes to, 17 and. 16 around the valve 13 and outwardly through the outlet pipe 14. When thevalve 13 is open, the

exhaust gas will pass through the valve and p cate the heat therefrom to the interior of the I '7 vehicle.

In order to maintain the temperature in side the vehicle more uniform and to prevent excessive heat therein and, furthermore, in order to insure the retention of the heat for a considerable period after the engine has been shut down, the pipes 15 and 16 are enclosed in jackets 20 and 21. Each of these jackets has a filling spout 22 covered by a cap 23 and each jacket also has a drain cook 24 at the bottom thereof.

In order to provide for the circulation of the fluid between the jackets and tomaintiin an equal amount of fluid in each jacket, the jackets are connected at the top thereof by pipes 25 and a connecting pipe 27 The jackets are also connected at the bottom portions thereof by a pipe 28. In this manner, the heated fluid will circulate through the two jackets and they will be maintained at a substantially uniform temperature.

The fluid circulation system may also, if desired, be carried out in the manner of the ordinary hot water heating system as shown in Fig. 3. In this figure, the jacket 20 is connected by a pipe 30 to a tank 31 which as shown in Fig. 4- may be mounted in the upper portion of the motor vehicle. The connection of the pipe 30 to the tank is made between the top and bottom thereof and 7 preferably below the normal level of the liquid therein. The tank is also connected by a pipe 32 to the bottom of the jacket 21. A vent 34a is provided in the top of the tank 31. i

In order to indicate to the vehicle opcafator the temperature of the fluid in the circulation system, a thermometer 35 may be mounted in any suitable location as on the dash of the vehicle and be connected in a suitable manner to indicate the temperature of the water in the jackets.

From the foregoing description it will be seen that simple, practical and economical means has been provided for a motor vehicle and-that the device described will operate to maintain a desirable temperature in the vehicle and, furthermore, the heat will be retained for a considerable time after the engine has been shut down.

Although one specific embodiment of the invention has been particularly shown and described. it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made Without departing "from the spirit or scope 01 the invention, as expressed in the following claims.

lVhat I claim is:

1. In combination, an engine exhaust conduit, a plurality of longitudinally extending lay-pass conduits connected to the exhaust conduit and adapted to receive exhaiu r therefrom and to conduct the hot gas lougitudinally in a vehicle, a Water jacket surrounding each bypass conduit and extending longitudinally in the vehicle and means for maintaining the circulation of Water in the jackets and thereby maintaining the temperature uniform therein.

2. In combination, an engine exhaust conduit, a pair of longitudinally extending bypass conduits connected to the exhaust conduit and adapted to receive exhaust gas therefrom and to conduct the hot gas longitudinally in a vehicle, a Water jacket surrounding each by-pass conduit and extending longitudinally in the vehicle and conduits connecting said jackets at the top and at the bottom thereof for maintaining the circulation of Water in the ackets and thereby maintaining the temperature uniform therein.

In Witness whereof, I have hereunto set my hand this 29th day of April, 1925.

PETER O. BJERKE. 

